I ran into an error today that I haven't seen before. My vSphere 5.0 cluster displayed the message “DRS invocation not completed” on the Summary tab and, I noticed, it stopped moving VMs around automatically too. I tried changing some of the DRS settings and running DRS from the DRS tab of the cluster just to try and see if that would get things going but to no avail. Interestingly, I couldn't find any mention of the message on the VMware KB site or anything useful in Google. I was tempted to turn DRS off completely and…

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